Mon, 18 Mar 2013 13:19:06 +0100
8008555: Debugging code in compiled method sometimes leaks memory
Summary: support for strings that have same life-time as code that uses them.
Reviewed-by: kvn, twisti
duke@435 | 1 | /* |
stefank@2314 | 2 | * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #ifndef SHARE_VM_RUNTIME_STATSAMPLER_HPP |
stefank@2314 | 26 | #define SHARE_VM_RUNTIME_STATSAMPLER_HPP |
stefank@2314 | 27 | |
stefank@2314 | 28 | #include "runtime/perfData.hpp" |
stefank@2314 | 29 | #include "runtime/task.hpp" |
stefank@2314 | 30 | |
duke@435 | 31 | class StatSamplerTask; |
duke@435 | 32 | |
duke@435 | 33 | /* |
duke@435 | 34 | * The StatSampler class is responsible for periodically updating |
duke@435 | 35 | * sampled PerfData instances and writing the sampled values to the |
duke@435 | 36 | * PerfData memory region. |
duke@435 | 37 | * |
duke@435 | 38 | * In addition it is also responsible for providing a home for |
duke@435 | 39 | * PerfData instances that otherwise have no better home. |
duke@435 | 40 | */ |
duke@435 | 41 | class StatSampler : AllStatic { |
duke@435 | 42 | |
duke@435 | 43 | friend class StatSamplerTask; |
duke@435 | 44 | |
duke@435 | 45 | private: |
duke@435 | 46 | |
duke@435 | 47 | static StatSamplerTask* _task; |
duke@435 | 48 | static PerfDataList* _sampled; |
duke@435 | 49 | |
duke@435 | 50 | static void collect_sample(); |
duke@435 | 51 | static void create_misc_perfdata(); |
duke@435 | 52 | static void create_sampled_perfdata(); |
duke@435 | 53 | static void sample_data(PerfDataList* list); |
duke@435 | 54 | static const char* get_system_property(const char* name, TRAPS); |
duke@435 | 55 | static void create_system_property_instrumentation(TRAPS); |
duke@435 | 56 | |
duke@435 | 57 | public: |
duke@435 | 58 | // Start/stop the sampler |
duke@435 | 59 | static void engage(); |
duke@435 | 60 | static void disengage(); |
duke@435 | 61 | |
duke@435 | 62 | static bool is_active() { return _task != NULL; } |
duke@435 | 63 | |
duke@435 | 64 | static void initialize(); |
duke@435 | 65 | static void destroy(); |
duke@435 | 66 | }; |
duke@435 | 67 | |
duke@435 | 68 | void statSampler_exit(); |
stefank@2314 | 69 | |
stefank@2314 | 70 | #endif // SHARE_VM_RUNTIME_STATSAMPLER_HPP |